On 13.07.2008, at 16:41, David Chelimsky wrote:
On Sun, Jul 13, 2008 at 9:32 AM, Pat Maddox <[EMAIL PROTECTED]> wrote:
On Sun, Jul 13, 2008 at 9:49 AM, Sven Fuchs <[EMAIL PROTECTED]
> wrote:
I've been wondering how to expect arbitrary methods being called
in a
particular order. The RSpec documentation for expecting method
calls on mock
objects mentions that it is possible to pass a block to
#should_receive, but
does not mention that it can be used to track the method call
order pretty
easily:
http://www.artweb-design.de/2008/7/13/expecting-arbitrary-method-calls-in-a-particular-order-in-rspec
Is there a better way of doing this?
If not, do you think it would make sense to add this to the RSpec
docs?
http://rspec.info/documentation/mocks/message_expectations.html
Hey Sven,
Mock objects have an optional notion of ordering. Check out the
following spec:
describe "a mock object" do
it "should expect ordered messages" do
foo = mock("ordered mock")
foo.should_receive(:first).ordered
foo.should_receive(:second).ordered
foo.should_receive(:third).ordered
foo.first
foo.second
foo.third
end
end
Changing the order in which they're called will raise an
ExpectationNotMetError.
Sven, FYI - this is explained on the page you mentioned:
http://rspec.info/documentation/mocks/message_expectations.html
Hey guys, thanks for the quick answers :)
Maybe I was not clear enough about what I wanted to spec. Or I
actually do not understand what #ordered does.
In Pat's spec above the methods #first, #second and #third are called
on the same object foo and the spec defines the order. That's kind of
the opposite of my usecase. I wanted to specify that the a method #run
(or whatever) is called on *different* objects in a particular order.
Like:
filter_1 = mock('filter_1')
filter_2 = mock('filter_2')
filter_chain << filter_1
filter_chain << filter_2
Now, when the filter_chain is run I want to expect that the filters
are run in the order they were added to the chain:
filter_chain.run
methods_called_on_individual_filters.should == ['filter_1#run',
'filter_2#run'] # pseudo-code
If that's possible somehow with should_receive(:run).ordered than at
least it's not very clear from that docs page which only talks about
expecting the order of methods being called on the same mock, not on
different mocks. ("There are times when you want to specify the order
of messages sent to *a* mock")
Am I missing something?
--
sven fuchs [EMAIL PROTECTED]
artweb design http://www.artweb-design.de
grünberger 65 + 49 (0) 30 - 47 98 69 96 (phone)
d-10245 berlin + 49 (0) 171 - 35 20 38 4 (mobile)
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